<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home'}">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary"
                     @click="addDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="roleList"
                border
                stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row v-for="(item1, i1) in scope.row.children"
                    :key="item1.id"
                    :class="['bdbottom', i1=== 0?'bdtop':'','vcenter']">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag>{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级以及三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套渲染二级权限 -->
                <el-row :class="[i2===0?'':'bdtop','vcenter']"
                        v-for="(item2,i2) in item1.children"
                        :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag v-for="(item3) in item2.children"
                            :key="item3.id"
                            type="warning"
                            closable
                            @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>

          </template>
        </el-table-column>
        <el-table-column type="index"
                         label="#"></el-table-column>
        <el-table-column label="角色名称"
                         prop="roleName"></el-table-column>
        <el-table-column label="角色描述"
                         prop="roleDesc"></el-table-column>
        <el-table-column label="操作"
                         width="300px">
          <template slot-scope="scope">
            <el-button size="mini"
                       type="primary"
                       icon="el-icon-edit"
                       @click="showEditDialog(scope.row.id)">编辑</el-button>
            <el-button size="mini"
                       type="danger"
                       icon="el-icon-delete"
                       @click="removeRoleById(scope.row.id)">删除</el-button>
            <el-button size="mini"
                       type="warning"
                       icon="el-icon-setting"
                       @click="showSetRightsDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 添加角色的对话框 -->
    <el-dialog title="添加角色"
               :visible.sync="addDialogVisible"
               width="50%"
               @close="addDialogClosed">
      <!-- 内容主题部分 -->
      <el-form :model="addForm"
               :rules="addFormRules"
               ref="addFormRef"
               label-width="80px">
        <el-form-item label="角色名称"
                      prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述"
                      prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部部分 -->
      <span slot="footer"
            class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary"
                   @click="addRole">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改角色的对话框 -->
    <el-dialog title="修改角色"
               :visible.sync="editDialogVisible"
               width="50%"
               @close="editDialogClosed">
      <el-form :model="editForm"
               :rules="editFormRules"
               ref="editFormRef"
               label-width="80px"
               @keyup.enter.native="editUserInfo">
        <el-form-item label="角色名称"
                      prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述"
                      prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 按钮区域 -->
      <span slot="footer"
            class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary"
                   @click="editUserInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改权限的对话框 -->
    <el-dialog title="修改权限"
               :visible.sync="setRightsDialogVisible"
               width="50%"
               @close="setRightsDialogClosed">
      <!-- 内容主题部分 -->
      <el-tree :data="rightsList"
               :props="treeProps"
               show-checkbox
               node-key="id"
               default-expand-all
               :default-checked-keys="defKeys"
               ref="treeRef"></el-tree>
      <!-- 底部部分 -->
      <span slot="footer"
            class="dialog-footer">
        <el-button @click="setRightsDialogVisible = false">取 消</el-button>
        <el-button type="primary"
                   @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default {
  data () {
    return {
      roleList: [],
      // 添加角色的表单是否隐藏
      addDialogVisible: false,
      // 添加角色表单的对象
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      addFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          { min: 3, max: 10, message: '角色名称的长度在3~10个字符之间', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' },
          { min: 3, max: 10, message: '角色描述的长度在3~10个字符之间', trigger: 'blur' }
        ]
      },
      // 编辑表单是否隐藏
      editDialogVisible: false,
      editForm: {},
      editFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          { min: 3, max: 10, message: '角色名称的长度在3~10个字符之间', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' },
          { min: 3, max: 10, message: '角色描述的长度在3~10个字符之间', trigger: 'blur' }
        ]
      },
      rightsList: [],
      setRightsDialogVisible: false,
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      defKeys: [],
      roleId: '',
      setRoleDialogVisible: false
    }
  },
  created () {
    this.getRoleList()
  },
  methods: {
    async getRoleList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败!')
      }
      this.roleList = res.data
    },
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    addRole () {
      // 表单的预校验
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return this.$message.error('表单填写失误!')
        // 发起添加用户的网络请求
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 201) {
          this.$message.error('添加角色失败')
        }
        this.$message.success('添加用户成功')
        // 隐藏添加用户的对话框
        this.addDialogVisible = false
        this.getRoleList()
      })
    },
    // 根据id查询相应的用户信息
    async showEditDialog (id) {
      this.editDialogVisible = true
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) return this.$message.error('查询角色信息失败')
      this.editForm = res.data
      this.editDialogVisible = true
    },
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    editUserInfo () {
      console.log('debugger')
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return this.$message.error('表单填写失误')
        // 发起修改信息的数据请求
        const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, {
          roleName: this.editForm.roleName,
          roleDesc: this.editForm.roleDesc
        })
        if (res.meta.status !== 200) {
          return this.$message.error('更新角色信息失败')
        }
        // 关闭对话框
        this.editDialogVisible = false
        // 刷新数据列表
        this.getRoleList()
        // 提示修改成功
        this.$message.success('更新角色信息成功')
      })
    },
    async removeRoleById (id) {
      // 弹框询问
      const confirmResult = await this.$confirm(
        '此操作将永久删除该用户，是否继续',
        '提示',
        {
          confirmButtonText: '确认',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除用户失败')
      }
      this.$message.success('删除用户成功!')
      this.getRoleList()
    },
    async removeRightById (role, rightId) {
      // 弹框提示
      const confirmResult = await this.$confirm(
        '此操作将删除该权限，是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除!')
      }
      // 确认删除的操作
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败!')
      }
      // this.getRoleList()
      role.children = res.data
    },
    // 测试函数
    test () {
      return this.$message.success('我是测试函数')
    },
    // 分配权限的对话框
    async showSetRightsDialog (role) {
      // 当前即将分配权限的角色id
      this.roleId = role.id
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败')
      }
      this.rightsList = res.data
      console.log(this.rightsList)
      this.getLeafKeys(role, this.defKeys)

      this.setRightsDialogVisible = true
    },
    // 获取默认勾选的数组
    getLeafKeys (node, arr) {
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => {
        this.getLeafKeys(item, arr)
      })
    },
    setRightsDialogClosed () {
      this.defKeys = []
    },
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败')
      }
      this.$message.success('分配权限成功')
      this.getRoleList()
      this.setRightsDialogVisible = false
    }

  }

}
</script>
<style lang="less">
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
